Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 892 · 40 questions

What you do (Find the experiment, use the idea): 1. Read the question and find its experiment. 2. Use that experiment’s idea — acid and base, indicator colours, chemical change, what seeds and yeast need, transpiration, crystals or filtering. 3. For a fair-test question, find what is changed, kept the same and measured. 4. For a safety question, choose what keeps everyone safe.

1. 1.True or false: chalk powder does not dissolve in water. (a) False (b) True
2. 2.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it disappears (b) it turns yellow again (c) it turns blue (d) it turns darker red
3. 3.🛟 What should you do after handling muddy water? (a) wash hands afterwards (b) wipe hands on face (c) lick your fingers (d) nothing is needed
4. 4.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a balloon (c) a paper clip (d) warm water
5. 5.True or false: writing the message is a job for an adult. (a) True (b) False
6. 6.🍞 Why do we add sugar to the yeast? (a) to make it heavy (b) it is food for yeast (c) to colour it (d) to make it sweet
7. 7.True or false: a funnel is needed for the muddy water filter. (a) False (b) True
8. 8.🛟 Which safety rule fits the fizzy balloon experiment? (a) put it in your mouth (b) seal it in a glass jar (c) shake it near your face (d) keep it away from eyes
9. 9.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the cream temperature”? (a) we change it (b) we keep it the same (c) we measure it
10. 10.True or false: sugar is needed for a seed to sprout. (a) True (b) False
11. 11.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “how hard we shake”? (a) we keep it the same (b) we change it (c) we measure it
12. 12.True or false: bad grains from rice is done by handpicking. (a) False (b) True
13. 13.🧂 Which of these does not dissolve in water? (a) cooking oil (b) food colour (c) glucose powder (d) sugar
14. 14.True or false: sunlight is not needed for the leafy bag test. (a) True (b) False
15. 15.🧺 Do we need water for the turmeric test? (a) needed (b) not needed
16. 16.🧺 Which of these is not needed for the muddy water filter? (a) a funnel (b) a clean glass (c) yeast (d) cotton or cloth
17. 17.🧺 Do we need a magnet for the yeast balloon? (a) not needed (b) needed
18. 18.🔍 Which is the odd one out? (a) putting the iron away (b) cutting the lemon (c) plugging in the iron (d) dipping the cotton bud
19. 19.🧺 Which of these is not needed for the muddy water filter? (a) a magnet (b) a funnel (c) sand and pebbles (d) muddy water
20. 20.True or false: turmeric powder is needed for the yeast balloon. (a) True (b) False
21. 21.🧺 Which of these is not needed for the secret lemon message? (a) an adult with an iron (b) a magnet (c) a small bowl (d) white paper
22. 22.🫗 How do we separate small stones from dal? (a) evaporating (b) handpicking (c) filtering (d) winnowing
23. 23.True or false: a magnet is needed for growing salt crystals. (a) False (b) True
24. 24.🧺 Which of these is not needed for the fizzy balloon? (a) sugar (b) a tray for spills (c) a funnel or spoon (d) an empty bottle
25. 25.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the turmeric paper (b) the light we look in (c) the liquid we test (d) the number of drops
26. 26.🪴 Which of these is a job of the roots? (a) give out water vapour (b) hold the plant in soil (c) hold up the leaves (d) make food in sunlight
27. 27.🧺 Which of these is not needed for the muddy water filter? (a) muddy water (b) turmeric powder (c) a funnel (d) cotton or cloth
28. 28.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we keep it the same (b) we change it (c) we measure it
29. 29.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the water temperature (b) size of the balloon (c) the same bottles (d) the amount of sugar
30. 30.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) the same dish (b) sunny or shady place (c) days to see crystals (d) the kind of salt
31. 31.True or false: turmeric powder is not needed for the leafy bag test. (a) True (b) False
32. 32.🌱 Which of these sprouts in a few days? (a) seeds in the freezer (b) wet seeds in the dark (c) seeds on dry cotton (d) boiled seeds
33. 33.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) sugar (c) warm water (d) turmeric powder
34. 34.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is the one thing we change. (a) False (b) True
35. 35.True or false: ironing the paper is a job a child can do. (a) True (b) False
36. 36.🛟 Who should use the hot iron in the secret message experiment? (a) only an adult (b) any child (c) the youngest child (d) whoever is fastest
37. 37.True or false: melting ice is a change that can be undone. (a) False (b) True
38. 38.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is what we measure? (a) the kind of plant (b) the size of the plant (c) amount of water drops (d) sun or shade
39. 39.🫗 How do we separate gravel from fine sand? (a) winnowing (b) filtering (c) handpicking (d) sieving
40. 40.🧺 Which of these is not needed for the leafy bag test? (a) a rubber band (b) a potted plant (c) vinegar (d) a clear plastic bag

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